[ltp] car and airplance adapter

[James Knott]

Peter Stuge wrote:

> Indeed. I erroneously thought that most DC-DC-converters were charge
> pumps rather than switched. It is obviously much better to have the
> supply produce a voltage that is closer to the final output and only
> regulate it moderately.
> 
> Thanks for correcting me! :)

With switching power supplies, as I described, the regulation can be 
applied to the input, which greatly improves efficiency.  They're even 
used in TVs and other consumer appliances, because they're cheap & 
efficient.  However, they can be real "fun" to repair.